Improvement in combined knob-latch and lock



tlui mi weresaew FRANCOIS'RAYMOND, OF TOODHAVEN YORK.

Lene/rs Patent No. 88,737, dated nmz 6, l1369.

IMPROVEMENT IN QOMBINED KNOB-LATCH AND LOCK To all whom it mayv concern:

in connection with' each other and the bolt, lwhereby` the bolt may be withdrawn alike bythe forward or backwardturning of the knob,.aud.\ vherehy'the bolt may be Vlocked or unlocked by the turning of the key, and whereby the knob is left free to turn while the lbolt is locked, and all so constructed and arranged as 'to produce a lock of compact form, and one that, when inserted into the edge of a door, will necessitate the removal of the least amount of substance hom the door.

' Referring to the accompanying drawing- A Figure 1 represents a longitudinalview of a loc constructed according to' my invention, with its intervening plate removed, showing the arrangement of the parts, in relation to each other, and to the bolt, while the same is locked;

Figure 2 represents a similar view of the lock, showing -the arrangement of the parts while the bolt is unlocked; Y v

Figure 3 represents a horizontal section of the saine;

Figure 4, a transverse section of the same, taken through the line x :ein iig. 1; and

Figure 5 represents a detached portionl of its working-parts, which are otherwisenot clearly shown.

Similar letters of reference indicate corresponding parts in the several gureS.

A is a lock-frame, of a double-cylindrical formation in its'transverse section, or other suitable form for endwise insertion, and for the removal-of the least substance from the door or other place to'which it may be applied.

B -is a sliding bolt, with the ordinary projecting bevelled end, and having provided upon one of' its sides, projections una, and for reception between them of a shooting-tumbler, O. l

Said tumbler G is arranged against the side 'of the bolt B, and between the said projections, as described, and is of a formation as represented in iig. 5, having at its forward end a reduced portion, b, for reception thereof between the said projections a. a, thereby to prevent its vertical displacement, while it prevents the' backward sliding ofthe bolt when the same is locked. Said tumbler C 1s also provided with a notch, c, in

It consists in the novel construction of a lock with` theunder sideof its rear portion, for reception of the projection ,al of the bolt, thereby to eiect the engagement of said tumbler and holt while the bolt is unlocked. e

It is also'provided with a rearwardlyextending hooked arm, d, for engaging with Aa projection, d', upon the back surface of.a double sliding rack, D, for effecting the backward or inward sliding of the said tumbler and bolt while the bolt is unlocked.

It is also provided, near its rear extremity, with a laterally projecting stud, e, for engagement within a T-snaped slot, c', cut in the rear extremity of one or more pivoted or lifting-tumblers E, thereby to lock into said slot c', when the key is turned ina certain direction, and to unlock therefrom' whenl the turning of the. key is reversed.

j' is a spiral spring,coiled around a rearward projection, B', of the bolt, and acting against a projection, f', of the frame A in such manner as to exert a constant pressure upon the said bolt in a forward or outward direction. Y

The double rack D, is preferably of a formation 'as represented in those parts of the drawing indicated by said lettereD, and consists of a semi-cylindrical hollow neck, h., with closed front end, and loosely fitting upon, or encasing one side of the front portion of the spring j, and with rearwardly-projecting upper and lowervparallel arms g g, withcorrugated' inner surfaces; v i

Said corrugated arms gV g are acted upon by the spurs of a cogged sector F, which is operated by the spindle of the knob, so that the forward or backward turning of the knob will cause the engagement ofthe said cogged sector Fwith one 4or the other of the said corrugated arms, thereby causing the backward 'sliding of vthe rack. Y

ASaid backward sliding ofthe rack D causes the compression -of the spring f, by means of the engage ment of the closed forward end of the hollow neck h with the forward 'extremity of said spring, so that, upon the releasement of the knob, the said rack is carried forward to its place again by the force of said spring. v

By turning the knob in either direction, reference being had to iig. 2, the cogged sector F will engagel with-the double rack D, so as to draw the same in a backward direction.

The shooting-tumbler C, by means of the engagement of its hooked arm d with the projection d of the rack D, will also be carried backward with said rack, its lateral projection, or stud e, at the same time, sliding within the straight portion of the slot e of the pivoted or lifting-tumblers E, and under a continua tion, or arm t' of said tumblers, thereby supporting them during -its entire sliding-distance.

By means of 'the engagement of the notch c of said tumbler C with the projection a. of the bolt, and furthermore, by the butting of the rear extremity of the lower portion of said shooting-tumbler against a projecting formation of the forward portion of the rearward extension B of the bolt B, said bolt is carried backward with the tumbler O, drawing its projecting v bevelled end into the frame.

Upon the releasement of the knob, the spring f, acting upon the double rack, as already described, and against the end of the bolt B, forces the said parts, together with the shooting-tumbler, to their original forward position. 4 v

By the turning of the key in the direction as indicated by the arrow, the shooting-tumbler G will at first be elevated to a sufficient height to clear the notch c from the projection af; also, -to disengage the hooked arm d from the projection d. l

By the onward movement of the key and its action within the curved notch j, the said tumbler O will be carried forward substantiallyY after the manner ot' the locking-boltof an ordinary lock, and to a sucient distance to cause the lateral projection e to enter the enlarged portion of the T-shaped slot c' of the lifting tumblers E, and be locked, in the upper notchthereot by the dropping of said tumblers E, assisted, it may be, by springs k.

This forward sliding, or shooting of the tumbler U, causes its lower projection c to be passed tothe top of the projection a', thereby retaining said tumbler in its elevated position, and thereby not only locks the bolt B, but alsol maintains the separation of the hook d and projection d.

In this posit-ion of the said parts, and which is represented in iig. 1, the shooting-tumbler C is prevented from'backward-sliding by the locked condition of its lateral stud e, Within the upper nbtch of' the T-shaped slot e'; and the bolt B is preventedvfrom backwardsliding by the locked condition of its projections a a vwith the front end of said shooting-tumbler O.

By the disengaged or unlocked condition of the hook d, and projection d", the knob is left free to turn while the bolt is locked, thereby preventing the liability of the lock to damage by the unnecessary wrenching of the knob in the hand of a strong person, to which other locks of this kind not having this improvement are constantly exposed.

By turning the key in the. opposite direction, the tumblers E are raised so as to release the lateral stud e of the shooting-tumblerlrom lock with the upper Anotch of their T-shaped slot e', whereupon said tumbler is carried back to its first position, the notch c dropping over the projection c', and the hook d locking with the projection d.

The under notch of the T-shaped slot e of the lifting-tumblers E, is designed to increase the dificulty of unlocking the bolt with other keys, which do not exactly t, and whereby, when a key is inserted which is a little too long, and by which the lifting-tumblers are raised higher `than necessary, the lateral stud e is locked in the said under-notch, and the tumbler C remains as securely locked as before.

This lock is also applicable to sliding doors, and other sliding shutters, byjaltering the construction of the bolt, as indicated by red outline in fig. l.

What I claim as my invention, and desire to have secured by LettersPatent, is-

The combination, with the knob shank and bolt of a lock, of the cogged sector F, double rack D, shooting-tumbler O, and slotted lifting-tumblers E, arranged for operation substantially as herein described.

Witnesses: FRANCOIS RAYMOND.

J. W. OooMBs, FRED. HAYNES. 

